Answers

Add 56/15 and 21/72

1^st number: 3 11/15, 2^nd number: 21/72

56/15 + 21/72 is 161/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 15 × 24 = 360,
   56/15 = 56 × 24/15 × 24 = 1344/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   21/72 = 21 × 5/72 × 5 = 105/360
4. Add the two like fractions:
   1344/360 + 105/360 = 1344 + 105/360 = 1449/360
5. 1449/360 simplified gives 161/40
6. So, 56/15 + 21/72 = 161/40
   In mixed form: 41/40

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